📄 06_04.jsp
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<html>
<head>
<title>使用连接池连接数据库</title>
</head>
<%@ page contentType="text/html;charset=GB2312" %>
<%@ page import="java.sql.*" %>
<jsp:useBean id="connManager" scope="application" class="test.DBConnManager" />
<body bgcolor="#CFF1E1">
<center><h2>
使用连接池连接数据库
</h2></center>
<%
Connection con1 = connManager.getConnection("access");
Connection con2 = connManager.getConnection("mysql");
if(con1==null||con2==null)
{
%>
对不起，现在数据库忙，请稍后再试
<%
}
Statement stmt1 = con1.createStatement();
Statement stmt2 = con2.createStatement();
%>
<h3>
访问Access型数据库test
</h3>
<table border=1 align="center">
<tr>
<td>用户名</td>
<td>姓名</td>
<td>电子邮件</td>
<td>住址</td>
</tr>
<%
ResultSet rs=stmt1.executeQuery("select * from Users");
while(rs.next())
{
%>
<tr>
<td><%=rs.getString("UserID")%></td>
<td><%=rs.getString("Name")%></td>
<td><%=rs.getString("Email")%></td>
<td><%=rs.getString("Address")%></td>
</tr>
<%
}
rs.close();
stmt1.close();
connManager.releaseConnection("access",con1);
%>
</table>
<h3>
访问Mysql型数据库testmysql
</h3>
<table border=1 align="center">
<tr>
<td>用户名</td>
<td>姓名</td>
<td>电子邮件</td>
<td>住址</td>
</tr>
<%
rs=stmt2.executeQuery("select * from Users");
while(rs.next())
{
%>
<tr>
<td><%=rs.getString("UserID")%></td>
<td><%=rs.getString("Name")%></td>
<td><%=rs.getString("Email")%></td>
<td><%=rs.getString("Address")%></td>
</tr>
<%
}
rs.close();
stmt2.close();
connManager.releaseConnection("mysql",con2);
%>
</table>
<%
connManager.closeConns();
%>
</body>
</html>
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